LCOV - code coverage report
Current view: top level - include/rtl - allocator.hxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 19 21 90.5 %
Date: 2014-04-14 Functions: 18 35 51.4 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : #ifndef INCLUDED_RTL_ALLOCATOR_HXX
      20             : #define INCLUDED_RTL_ALLOCATOR_HXX
      21             : 
      22             : #include <sal/config.h>
      23             : 
      24             : #include <sal/types.h>
      25             : #include <rtl/alloc.h>
      26             : #include <cstddef>
      27             : 
      28             : /// @cond INTERNAL
      29             : 
      30             : 
      31             : // This is no general purpose STL allocator but one
      32             : // necessary to use STL for some implementation but
      33             : // avoid linking sal against the STLPort library!!!
      34             : // For more information on when and how to define a
      35             : // custom stl allocator have a look at Scott Meyers:
      36             : // "Effective STL", Nicolai M. Josuttis:
      37             : // "The C++ Standard Library - A Tutorial and Reference"
      38             : // and at http://www.josuttis.com/cppcode/allocator.html
      39             : 
      40             : namespace rtl {
      41             : 
      42             : template<class T>
      43             : class Allocator
      44             : {
      45             : public:
      46             :     typedef T value_type;
      47             :     typedef T* pointer;
      48             :     typedef const T* const_pointer;
      49             :     typedef T& reference;
      50             :     typedef const T& const_reference;
      51             :     typedef ::std::size_t size_type;
      52             :     typedef ::std::ptrdiff_t difference_type;
      53             : 
      54             : 
      55             :     template<class U>
      56             :     struct rebind
      57             :     {
      58             :         typedef Allocator<U> other;
      59             :     };
      60             : 
      61             : 
      62             :     pointer address (reference value) const
      63             :     {
      64             :         return &value;
      65             :     }
      66             : 
      67             : 
      68             :     const_pointer address (const_reference value) const
      69             :     {
      70             :         return &value;
      71             :     }
      72             : 
      73             : 
      74      637586 :     Allocator() SAL_THROW(())
      75      637586 :     {}
      76             : 
      77             : 
      78             :     template<class U>
      79      425054 :     Allocator (SAL_UNUSED_PARAMETER const Allocator<U>&) SAL_THROW(())
      80      425054 :     {}
      81             : 
      82             : 
      83      425054 :     Allocator(const Allocator&) SAL_THROW(())
      84      425054 :     {}
      85             : 
      86             : 
      87     1062635 :     ~Allocator() SAL_THROW(())
      88     1062635 :     {}
      89             : 
      90             : 
      91           0 :     size_type max_size() const SAL_THROW(())
      92             :     {
      93           0 :         return size_type(-1)/sizeof(T);
      94             :     }
      95             : 
      96             : 
      97             :     /* Normally the code for allocate should
      98             :        throw a std::bad_alloc exception if the
      99             :        requested memory could not be allocated:
     100             :        (C++ standard 20.4.1.1):
     101             : 
     102             :        pointer allocate (size_type n, const void* hint = 0)
     103             :        {
     104             :          pointer p = reinterpret_cast<pointer>(
     105             :              rtl_allocateMemory(sal_uInt32(n * sizeof(T))));
     106             : 
     107             :          if (NULL == p)
     108             :              throw ::std::bad_alloc();
     109             : 
     110             :          return p;
     111             :        }
     112             : 
     113             :        but some compilers do not compile it if exceptions
     114             :        are not enabled, e.g. GCC under Linux and it is
     115             :        in general not desired to compile sal with exceptions
     116             :        enabled. */
     117     2125348 :     pointer allocate (size_type n, SAL_UNUSED_PARAMETER const void* = 0)
     118             :     {
     119             :         return reinterpret_cast<pointer>(
     120     2125348 :             rtl_allocateMemory(sal_uInt32(n * sizeof(T))));
     121             :     }
     122             : 
     123             : 
     124       42519 :     void deallocate (pointer p, SAL_UNUSED_PARAMETER size_type /* n */)
     125             :     {
     126       42519 :         rtl_freeMemory(p);
     127       42519 :     }
     128             : 
     129             : 
     130             : #if HAVE_CXX11_PERFECT_FORWARDING && !defined(_LIBCPP_VERSION)
     131             :     template< typename... Args >
     132     3570535 :     void construct (pointer p, Args &&... value)
     133             :     {
     134     3570535 :         new ((void*)p)T(std::forward< Args >(value)...);
     135     3570535 :     }
     136             : #else
     137             :     void construct (pointer p, const T& value)
     138             :     {
     139             :         new ((void*)p)T(value);
     140             :     }
     141             : #endif
     142             : 
     143             : 
     144       42519 :     void destroy (pointer p)
     145             :     {
     146       42519 :         p->~T();
     147             :         (void)p; //MSVC2005 annoyingly warns this is unused
     148       42519 :     }
     149             : };
     150             : 
     151             : 
     152             : // Custom STL allocators must be stateless (see
     153             : // references above) that's why the operators below
     154             : // return always true or false
     155             : 
     156             : template<class T, class U> inline bool operator ==(
     157             :     SAL_UNUSED_PARAMETER const Allocator<T>&,
     158             :     SAL_UNUSED_PARAMETER const Allocator<U>&) SAL_THROW(())
     159             : {
     160             :     return true;
     161             : }
     162             : 
     163             : template<class T, class U>
     164             : inline bool operator!= (const Allocator<T>&, const Allocator<U>&) SAL_THROW(())
     165             : {
     166             :     return false;
     167             : }
     168             : 
     169             : } /* namespace rtl */
     170             : 
     171             : /// @endcond
     172             : 
     173             : #endif /* INCLUDED_RTL_ALLOCATOR_HXX */
     174             : 
     175             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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